<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home/welcome' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片 -->
        <el-card class="box-card">
            <!-- 提示区域 -->
            <el-alert title="添加商品信息" :closable="false"  type="info" center show-icon> </el-alert>
            <!-- 步骤条 -->
            <el-steps :space="200" :active="activeindex-0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>

            <el-form :model="addForm" :rules="addrules" ref="addruleForm" label-width="100px" class="demo-ruleForm">
                <el-tabs @tab-click="tabClicked" :before-leave="beforeTabLeave" tabPosition="left" v-model="activeindex">
                    <el-tab-pane label="基本信息" name="0">
                        <!-- 基本信息 -->
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price">
                        <el-input v-model="addForm.goods_price" type="number"></el-input>
                            </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类" prop="goods_cat">
                            <el-cascader
                                v-model="addForm.goods_cat"
                                :options="cateList"
                                :props="cascaderProps"
                                @change="handleChange"
                            ></el-cascader>
                        </el-form-item>

                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                            <!-- 渲染表单的Item项 -->
                            <el-form-item
                            v-for="item in manyTableData"
                            :key="item.attr_id"
                            :label="item.attr_name">
                                <!-- 复选框组 -->
                                <el-checkbox-group v-model="item.attr_vals">
                                    <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border></el-checkbox>
                                </el-checkbox-group>
                            </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id" label-width="200px">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                            <el-upload
                            class="upload-demo"
                            :action="uploadURL"
                            :on-preview="handlePreview"
                            :on-remove="handleRemove"
                            :headers="headerObj"
                            :on-success="handleSuccess"
                            list-type="picture">
                            <el-button size="small" type="primary">点击上传</el-button>
                            </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                        <el-button type="primary"  class="btnAdd" @click="addGoods" >添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
        </el-card>
        <el-dialog title="图片预览" :visible.sync="previewDialogVisible" width="50%">
            <img :src="picPreviewPath" alt="" class="previewImg">
        </el-dialog>
    </div>
</template>

<script>
import _ from 'lodash'
export default {
    data() {
        return {
            activeindex:'0',
            // 添加商品的表单对象
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                //商品所属分类数组
                goods_cat: [],
                // 图片的数组
                pics: [],
                // 商品详情描述
                goods_introduce: '',
                attrs: []
            },
            addrules:{
                    goods_name:[
                        { required: true, message: '请输入商品名称', trigger: 'blur' }
                    ],
                    goods_price: [
                        { required: true, message: '请输入商品价格', trigger: 'blur' }
                    ],
                    goods_weight: [
                        { required: true, message: '请输入商品重量', trigger: 'blur' }
                    ],
                    goods_number: [
                        { required: true, message: '请输入商品数量', trigger: 'blur' }
                    ],
                    goods_cat: [
                        { required: true, message: '请选择商品分类', trigger: 'blur' }
                    ]
            },
            //商品分类
            cateList:[],
            // 级联选择器配置
            cascaderProps: {
                expandTrigger: 'hover',
                label: 'cat_name',
                value: 'cat_id',
                children: 'children'
            },
            //商品参数列表
            manyTableData:[],
            //商品属性列表
            onlyTableData:[],
            //图片上传地址
            uploadURL:'http://timemeetyou.com:8889/api/private/v1/upload',
            //uploadURL:'http://119.23.53.78:8888/api/private/v1/upload',
            headerObj:{
                Authorization: window.sessionStorage.getItem('token')
            },
            //图片预览
            previewDialogVisible:false,
            picPreviewPath:''
        }
    },
    created() {
        this.getCateList()
    },
    computed: {
        getCateId () {
        if (this.addForm.goods_cat.length === 3) {
            return this.addForm.goods_cat[2]
        }
        return null
        }
  },
    methods: {
        // 获取商品分类数据列表
        async getCateList () {
            const { data: res } = await this.$http.get('categories')
            if (res.meta.status !== 200) {
                return this.$message.error('获取商品列表失败！')
            }
            this.cateList = res.data
        },

        //选择商品分类 只能选择三级分类
        handleChange(){
            if (this.addForm.goods_cat.length !== 3) {
                this.addForm.goods_cat = []
            }
        },

        beforeTabLeave(activeName, odlActiveName){
            // 未选中商品分类阻止Tab标签跳转
            if (odlActiveName === '0' && this.addForm.goods_cat.length !== 3) {
                this.$message.error('请先选择商品分类')
                return false
            }
        },

        //tab被选中时
        async tabClicked(){
            if(this.activeindex==='1'){
                const { data: res } = await this.$http.get(
                `categories/${this.getCateId}/attributes`,
                {
                    params: { sel: 'many' }
                }
                )
                if (res.meta.status !== 200) {
                return this.$message.error('获取动态参数列表失败！')
                }
                res.data.forEach(item => {
                item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
                })
                this.manyTableData = res.data
            }
            else if (this.activeindex==='2') {
                const { data: res } = await this.$http.get(
                    `categories/${this.getCateId}/attributes`,
                    {
                        params: { sel: 'only' }
                    }
                )
                if (res.meta.status !== 200) {
                return this.$message.error('获取动态参数列表失败！')
                }
                this.onlyTableData = res.data
                console.log(this.onlyTableData)
            }
        },
        //点击图片
        handlePreview(file){
            this.picPreviewPath = file.response.data.url
            this.previewDialogVisible = true
        },
        //移除图片
        handleRemove(){

        },
        //图片上传成功
        handleSuccess(response){
            // 1.拼接得到一个图片信息对象 临时路径
            const picInfo = { pic: response.data.tmp_path }
            // 2.将图片信息对象，push到pics数组中
            this.addForm.pics.push(picInfo)
        },

        //添加商品
        addGoods(){
            this.$refs.addruleForm.validate(async valid => {
                if (!valid) {
                    return this.$message.error('请填写必要的表单项')
                }
                //执行添加的功能
                //将this.addForm进行深拷贝
                const form = _.cloneDeep(this.addForm);
                form.goods_cat = form.goods_cat.join(',');
                //处理动态参数和静态属性

                this.manyTableData.forEach(item=>{
                    const newinfo={
                        attr_id:item.attr_id,
                        attr_value:item.attr_vals.join(' '),
                    }
                    this.addForm.attrs.push(newinfo)
                })

                this.onlyTableData.forEach(item=>{
                    const newinfo={
                        attr_id:item.attr_id,
                        attr_value:item.attr_vals,
                    }
                    this.addForm.attrs.push(newinfo)
                })

                form.attrs=this.addForm.attrs;
                const { data: res } = await this.$http.post('goods', form)
                if (res.meta.status !== 201) return this.$message.error('添加商品失败！')
                this.$message.success('添加商品成功!')
                this.$router.push('/goods')
            })
        }

    },
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 8px 0 0 !important;
}
.previewImg{
  width: 100%;
}
.btnAdd{
  margin-top: 15px
}
.el-form-item{
    display: block;
}

</style>